Zobrazeno 1 - 10
of 180
pro vyhledávání: '"Barbosa, A. L. R."'
L\'evy flight for electrons in graphene in the presence of regions with enhanced spin-orbit coupling
We propose an electronic L\'evy glass built from graphene nanoribbons in the presence of regions with enhanced spin-orbit coupling. Although electrons in graphene nanoribbons present a low spin-orbit coupling strength, it can be increased by a proxim
Externí odkaz:
http://arxiv.org/abs/2405.10066
We investigate a generalized multi-orbital tight-binding model on a triangular lattice, a system prevalent in a wide range of two-dimensional materials, and particularly relevant for simulating transition metal dichalcogenide monolayers. We show that
Externí odkaz:
http://arxiv.org/abs/2311.11715
Publikováno v:
Phys. Rev. B 108, 245105 (2023)
We investigate the orbital Hall effect through a mesoscopic device with momentum-space orbital texture that is connected to four semi-infinite terminals embedded in the Landauer-B\"uttiker configuration for quantum transport. We present analytical an
Externí odkaz:
http://arxiv.org/abs/2305.01640
Publikováno v:
Phys. Rev. B 107, 155432 (2023)
In this work we propose an electronic L\'evy flight device, analogous to a recent optical realization. To that end, we investigate the transmission of electrons in graphene nanoribbons in the presence of circular electrostatic clusters, whose diamete
Externí odkaz:
http://arxiv.org/abs/2302.02197
Autor:
da Silva, Juliana M., Santana, Fernando A. F., Ramos, Jorge G. G. S., Barbosa, Anderson L. R.
Publikováno v:
Journal of Applied Physics 132, 183901 (2022)
We investigate the spin Hall effect in a single-layer graphene device with disorder and interface-induced spin-orbit coupling. Our graphene device is connected to four semi-infinite leads that are embedded in a {Landauer-B\"uttiker} setup for quantum
Externí odkaz:
http://arxiv.org/abs/2210.09393
Publikováno v:
Phys. Rev. E 106, 054127 (2022)
We investigate the propagation of waves in one-dimensional systems with L\'evy-type disorder. We perform a complete analysis of non-relativistic and relativistic wave transmission submitted to potential barriers whose width, separation or both follow
Externí odkaz:
http://arxiv.org/abs/2210.09388
Publikováno v:
Journal of Physics 55, 375202 (2022)
We consider the problem of electronic quantum transport through ballistic mesoscopic systems with chaotic dynamics, connected to a three-terminal architecture in which one of the terminals has a tunnel barrier. Using a semiclassical approximation bas
Externí odkaz:
http://arxiv.org/abs/2204.02788
Autor:
Barbosa, Anderson L. R., de Lima, Tiago H. V., Gonzalez, Ivan R. R., Pessoa, Nathan L., Macedo, Antonio M. S., Vasconcelos, Giovani L.
Publikováno v:
Phys. Rev. Lett. 128, 236803 (2022)
We offer a new perspective to the problem of characterizing mesoscopic fluctuations in the inter-plateau region of the integer quantum Hall transition. We found that longitudinal and transverse conductance fluctuations, generated by varying the exter
Externí odkaz:
http://arxiv.org/abs/2203.10082
We perform a multifractal detrended fluctuation analysis of the magnetoconductance data of two standard types of mesoscopic systems: a disordered nanowire and a ballistic chaotic billiard, with two different lattice structures. We observe in all case
Externí odkaz:
http://arxiv.org/abs/2111.10445
Publikováno v:
Phys. Rev. B 103, 081111 (2021)
Van der Waals heterostructures based on two-dimensional materials have recently become a very active topic of research in spintronics, both aiming at a fundamental description of spin dephasing processes in nanostructures and as a potential element i
Externí odkaz:
http://arxiv.org/abs/2012.14216